1 lx 2 weeks ago About a year ago I mentioned stumbling across a '58 6120 with Filters but not the usual heavy trestles. Instead, there were four blocks on the inside of the rounded parallel braces right below each side of the pups. This is serial #26593 and was almost as light as a Dyna 6120. I neglected to take a shot of the neck heel which did not have the usual necklock/screw. You can just see the block going down right against the back of the 6120 with none of usual trestle features. Gretsch switched to the flat parallel braces shortly after this and made them standard on all models -- probably to save money as they thought it was no longer necessary, as well as to accomodate the trestle feature. My '57 Clipper has the rounded braces but the '58 and '59 do not.